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Buzz Aldrin, NASA Administrator Charles Bolden and astronaut twins Mark and Scott Kelly will be guests on ABC's "This Week." The program airs at 11 a.m. Sunday on WFTV-Channel 9. The Kelly brothers describe their preparations for a space study starting next week that will contrast Scott's body from a year-long mission aboard the International Space Station with retired astronaut Mark's body on Earth. "Studies will compare data from the genetically identical Kelly brothers to identify any subtle changes caused by spaceflight," NASA says. Bolden and former astronaut Buzz Aldrin explain why the study could bolster a manned mission to Mars. ...

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Buzz Aldrin, NASA Administrator Charles Bolden and astronaut twins Mark and Scott Kelly will be guests on ABC's "This Week."
The program airs at 11 a.m. Sunday on WFTV-Channel 9.
The Kelly brothers describe their preparations for a space study...

An Atlas V rocket is scheduled to launch from Cape Canaveral Air Force Station at 10:44 p.m. Thursday night carrying satellites designed to help scientists understand magnetic storms in space.
The Air Force is projecting a 70 percent chance of acceptable...

The cost of his lifelong dream of being an astronaut on Mars may be the ultimate sacrifice — his life — yet George Hatcher is ready to say yes.
"It was something I always wanted to do, that I had pursued through academic degrees, through my career...

Frank DiBello is president of Space Florida, the state-chartered agency now seeking development of a spaceport in Florida. He also is chairman of the international Commercial Spaceflight Federation. DiBello, 72, recently spoke with Sentinel staff reporter...

Astronauts stepped out on a spacewalk Saturday to perform some tricky cable work needed before new American-made crew capsules can dock at the International Space Station.
It was the first of three spacewalks planned for NASA astronauts Butch Wilmore and...

KENNEDY SPACE CENTER — Hoping to make liftoffs less expensive,SpaceX wants to land its rockets not on a barge at sea butat a new pad on Cape Canaveral.The California-based rocket company still has to prove that it can safely land...

After a nearly eight-year journey, a NASA spacecraft on Friday flawlessly slipped into orbit around Ceres in the first visit to a dwarf planet. The robotic Dawn craft will circle the dwarf planet for more than a year, exploring its surface and...

From the high desert of southern Arizona on Sunday morning, University of Central Florida physics professor Robert Peale will launch a device that could one day help find evidence of life on Mars or other parts of the solar system. Peale and his...

LEESBURG — Three, two, one…liftoff.
Students at Rimes Early Learning and Literacy Center got a chance to launch "rockets" when NASA engineer Ali Shaykhian showed up at the prekindergarten through second-grade school. His recent visit launched...

KENNEDY SPACE CENTER — SpaceX's Falcon 9 rocket blasted off Wednesday into a clear sky colored by a setting sun, sending a satellite into space to monitor solar storms that can wreak havoc on Earth's power and communication systems.
The 6:03 p.m....

We don't recommend staring into the sun, but you should check out this time lapse video of five years of the sun's activity in just minutes.
NASA released the video and stunning images to celebrate the fifth anniversary of its Solar Dynamics...

SpaceX plans to try again Sunday night to land its used rocket on an unmanned barge in the Atlantic Ocean after launching it into space, an experiment seen as a big step toward making space launches dramatically less expensive.
The company is scheduled...

KENNEDY SPACE CENTER – SpaceX scrubbed its Falcon 9 rocket launch from Cape Canaveral Space Station on Tuesday morning.
NASA said the problem was with a thruster control on the second stage of the rocket.
The private company is evaluating the issue,...

The Kennedy Space Center Visitor Complex will play host to the SpaceX Dragon spacecraft for four days, beginning Friday.
In May 2012, the vessel was the first commercial spacecraft to deliver cargo to and from the International Space Station. That...

Each year around this time, NASA honors fallen astronauts, including the 17 men and women killed in three separate wintertime accidents in the sky and on the earth.
For Robert "Hoot" Gibson, it's a time to remember lost friends and some of...

SpaceX and NASA plan to launch a rocket Tuesday morning to send supplies and equipment to the International Space Station — the first such mission since another company's effort blew up in Virginia in October.The SpaceX rocket Falcon 9 is set to launch...

KENNEDY SPACE CENTER — Once the launchpad for Apollo and space shuttle flights, NASA's historic Launch Complex 39A is now in the hands of SpaceX and its enigmatic billionaire leader, Elon Musk.
With a 20-year lease, the privately held Hawthorne,...

UPDATED: "Unbroken" author Laura Hillenbrand will be on two Sunday morning programs, and NASA Administrator Charles Bolden is featured on CNN.The Sunday morning lineup:Hillenbrand talks about the film version of "Unbroken" on CBS'...

The next launch of the SpaceX Falcon 9 rocket from Cape Canaveral Air Force Station has been postponed three days to Dec. 19, NASA announced Thursday.The rocket is scheduled to send the SpaceX Dragon cargo capsule to the International Space Station.In a...

KENNEDY SPACE CENTER — NASA is preparing to launch its next-generation, deep-space capsule Orion next month on its first spaceflight, a mission that a NASA administrator Thursday called "our first step in our journey to Mars."
At a briefing,...